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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. To remove/separate testicles from animal's body before animal reaches puberty






2. 10-37 (21) days






3. (LH) causes female's egg to break (her period)






4. Days which have increasing daylight hours

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5. ~305 days (altough often longer due to breeding difficulties)






6. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






7. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






8. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






9. (male) pushes the testes outward toward the legs for a cool-down off of the body






10. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract






11. Microscopic - make sure not sterile - very few bulls are actually tested






12. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).






13. Superior genes are _______ to multiply






14. 14-19 (17) days






15. Sperm production






16. 45-60 days after breeding; re-breed as required






17. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.






18. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






19. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






20. Prevent the cow from getting an infection from the calve






21. 4-6 days






22. Help to signal hormone levels which we need both in the brain right next to each other.






23. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






24. (male) pushes the testes outward toward the legs for a cool-down off of the body






25. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.






26. Failure to have both testis (gonads) descend






27. Depository for semen during insemination. where urine leaves the body






28. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood






29. Reproduction. more offspring leads to more feed costs - but is offset by reproduction numbers






30. Important 'landmark' during palpation






31. Front feet and head first. (except for hogs and dogs)






32. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






33. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.






34. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






35. % of fat in milk. makes cheeses and ice cream. regulates cost of milk






36. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






37. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






38. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %






39. Days which have increasing daylight hours

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40. Milk is 15% ________ and 85% __________.






41. 2 month growth cycle. stored in the epididymis of the bull






42. Way to know everything is alright with the breeding male






43. Can survive ~7 days in cow. vast majority <48 hours






44. Duct through penis that carries sperm and urine






45. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






46. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)






47. What makes the milk flow through the mammary glands?






48. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






49. Provide nourishment for the developing sperm






50. 336 days